羊草又名碱草,是多年生长禾本科根茎牧草,株高一般在30～95厘米,茎杆直立,圆形中空,穗状花序,长12～18厘米。每个大穗上有10～12个小穗,每个小穗含花5～7枚,种子是颖果,籽实大小如芝麻粒,结晶透明。成熟后穗变黄色。采种要在穗状花序有50％变黄时即可收集(一般在七月下旬)。早收结实率低,影 Leymus chinensis, also known as Soda Grass, is a perennial gramineous rhizome forage, plant height is generally 30 to 95 cm, stem erect, hollow round, spikes, 12 to 18 cm long. Each big spike has 10 to 12 spikelets, each spikelet containing flowers from 5 to 7, the seeds are caryopses, seed size, such as sesame seeds, crystal clear. Spikes become yellow after maturity. Seeds should be collected when spikes are 50% yellow (usually late July). Early fruiting rate is low, shadow